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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '985bd844bec29637f03b3d60af9f1ee7622c84bbe904b831d9e7922d34622e76' 
  AND token = 'mLYHoDjHwze100/dpypA6Htv1FVLrx6lG8K+C/eTOVw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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