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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9194f196f0b7eab1f4fa2e5ece97431d032e502bb55f2e0080399e9125659554' 
  AND token = 'fUeQuy2n6eOXM18e/hzNTCUK3lHE20JoqBZqNu72T0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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