SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4234149fa0f0c4c97c0238549d1d3a196a5b25faadad7290d402564cf2a8b712' 
  AND token = 'Jm4RJclpeJ+P+EwFAolMzgyhkWZQlj+YZl/oRkCwEGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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