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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14b7813657b44adb4a2e7d41b6d6e3d979fb005fa44c99ba36d467e4ae1dff09' 
  AND token = '6uUW05h/3YwFEcSYPAscjcFymlWrvNbrqtRZO2GSqWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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