Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29c52e460584c078acf7c034a50bc28185cabf9f5626402a98c9a2289ae62a48' 
  AND token = 'fwPP0qtAMCDsXkL7/qL7s7O9AqFoXtnMOVGrGGPkFT4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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