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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dda910fe4be886d9b9d77f9341b96dd5d8ba961fd21360bd010d7444b3b5dc4' 
  AND token = 'Wi2AKSvlgsE5hr7ATqqDP1cnrwINL+SZx+nQHU1CtiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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