Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a70691ef81b8118fe5b14d74f62605ff48400ff90b3d0e9e332c6550fbcd0f1' 
  AND token = 'MFN2RWXXulRI0ins9USY56C7vdEtfL8O8rCJ6RvRFL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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