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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '79d4b74d0f97603886749e95e895d5059683c8f971233f4018771c1c9aa07a3c' 
  AND token = 'UX0S0XjCM6yQYAStsI8dtRD5TkRRR7x/sy34mJ5A5aI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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