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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ea5b1ba11f39737f7049d32614aef5b17c15b8419d3bba9f96cf58c17b032cf' 
  AND token = 'YOSxc7WNM6Q51wr0SRDtFYP0deIt6gy2nn7Nbh7xeys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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