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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ff00b5c4b7a9b782cdfe807b21feb952127a3f5ca604200fe98b9268df293eb' 
  AND token = 'IEbA34SxyTqP1Vxk72rZ2qdbbTURCj/huYJeBk42NK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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