Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e45816ac2c349e914510f6ef33c1b49b0ed2efa4cbb81e032114a0ced2f52685' 
  AND token = 'C3XHo80XaPl8dRl0ynu62twcw9PTWxY2cNeIvbWZfr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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