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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '860d4928ca541060f64c6c434d382fc889465cc2d7e50cb8167a7a20fa0bcda4' 
  AND token = 'PvT1QkiJGGm50phc3A5q2QaQr778O9Rq5WCRX0ioHa4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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