Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01b168022fea770db75e2ba4e1523bfbc8753dfb6981620348603a3f2ed23128' 
  AND token = '0gCKI4d2bZqpSy53yaeGJuNlXW//ZyvV0YrX5LOe6Yo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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