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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1455156ce1002a2a7be0a006c72ab8a632d78c998af5b489c920d7b586218719' 
  AND token = 'IqLffirLscUF/5uoNF8u93o2nq/+v+rA3tXc+E1Nc9Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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