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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a1727cfea054ebe5032b79b142e9d1ac9eba5a681799390bf4bade69300f9cc' 
  AND token = 'Gfq0kMOl6rFhl7G1TmI3PlG4a1EhRy45WN7gzzQU1Pg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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