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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d0745d4acdcf6645f05f8d1502c473ff885427042e2e53b05178dc40ef85fb7' 
  AND token = 'ATgDyRt6ahPrGHZRItS+64NMKVFvm3SP7t5lO0LKRa4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}