SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ba110e04ac53758fd939752470f1fe58653eae8c07cdb4965de64ae6b75b44d' 
  AND token = '6X/VC2LQX+Eoksz+nT3YrY/YjXNGWJipWO8a1Jm4hBw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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