SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '133baea77490f265df1a48ce95715913cb596ce272b416998d86653606cbb1fa' 
  AND token = 'Y33qLX4kvZK+k5uENmaEThV4/YkxePHvKdzLvFpmYSg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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