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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30131c9a0badf0f5a9029ad8a41518f3ba30d72b01d6468d3baf35018ee271ff' 
  AND token = 'T37o7y6piLrmd/G42IqEbOra37Iivr9tnQEls+wA9d4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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