Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49bcea9d752db2ac99f1da9a95b35896acf1ce1a2f79b92f558ca2d8cc0e43e5' 
  AND token = '7G1u+vDrRExCWuvyCRZEWnuapG83psE0d4moLyalEGM=' 
  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"
    }
  }
}