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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d2cf2974b74863b1b1b1afd2e8eb3f7cccfb61ba79038cc3e83f4bb3c364fc4' 
  AND token = '1jOcha2c8RGaluiWcuE8vMErASgKVJw39ooajAU3tp8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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