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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4333f5f79e386c7e77abed75b445410488c5fab7a9fa975ced69e70322004a76' 
  AND token = 'tj2pVhmsQ8inQPOPg1aa8lkCpk8kTOPCFEvCE7ctRBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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