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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d2a11acb32e1ac81d731b4dc3631ac0bbc4364b35a5dcc1b82fac9e9bd5a390' 
  AND token = 'EjPn8y1bkUFS5x2QBR7cU3WRg8rdL/zSIJqWCxGvoF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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