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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b928e3180b833191fbdd8dcae819cc8035b2c53fec78543088cfb7541ab5efae' 
  AND token = 'fbKcPrD9Lnb5/uHknH4sFInHBamVBrqxHQ+KBv8QDaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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