Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f40031e271a0423495ebfd9e5fd82d1f7dd5cd416870b574f2c4ea3f373075f' 
  AND token = 'VFD6GRCBLY6EFMr1zJ21q0uAKbcpTqrmxO+2zWmcxFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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