Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff02a24fc83dc2413183e903cc4be2e62efb94f5dbcb4827b43d0c5920c69216' 
  AND token = 'F1uh2uM8stGqvFDDnOux7Z2rzBrlfFluiZFpdQRRjZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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