SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '817a5cf53e916bb3296599c3d360c650218d77c9f6bc855494d32f5b3f824c87' 
  AND token = 'AIGQ0UNz3SW/J3WTHEuCqynUW8KnWzw4QQ3PRkKY9YE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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