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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebb2b197ecc0cd6db248629b26f1739d7461980d69e9c3d4586e7b7ac4fab1f7' 
  AND token = 'UOXygn+2K4es1a95wUZMEnfIADQrXKzRE61wuTQm4y8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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