SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a04199473e242ba44607a535b33a82a924bf72b677b3ff391518dc0fd70344b' 
  AND token = 'h9ccvfZgKTK79XiLB+oaje1V61xVloROsPGHu8v4DrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}