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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a8593689516d7f31e294fb8f8f9fc3ba9f277400afc715b9a5361826764ecdc' 
  AND token = 'hGbe3o5TbxJO182ElLXl0SZizeBmafgUel4pehCx4lU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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