Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67973f15f37cd4aa230f67e4509499b6c27ca4700f7c094568173145a063c73c' 
  AND token = '+hG7zLXL83SVe43DMP49whL1sHieWGsZhw2bzF+J0h8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}