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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bed0ccfa02b3b496e79b9f40c9002c3d196454c6c971f51e148ec120f2d40b1' 
  AND token = 'ywMp2EK58PVU2ULM0PK0IQcLIwVWpZonH01Pg9Uc6ZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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