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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ae28c9e97fa3352eca70de8045cae8e4421aa75660c38867187a8a897de4470' 
  AND token = 'uLwblD8KQ+auVYK/wnAF47kK7BsmodmkoaO++ulrdxQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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