Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16721b63bc698cf8ec5718a2a1961a2f6ee278ae34b6a99a923c21ecc59317b7' 
  AND token = '8ZPOCNikUxfe/0U+yqEXwDmukHkcD5Qm2L2zvgw2a5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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