Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc0b820eea46d2c17de4914afc24019c59d5e61e601294d82f25cf91a5283ff3' 
  AND token = '81vOFUWiZ86zzXfNtK7o6w+ZP5qI2ZUs2UrenYRVGLs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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