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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'e3bda8125e9f173a672de1a34bebcf899b2ebc0e96b1ad9ab404b77eb1e306f1' 
  AND token = 'I/uy2K1drDqvk48W9gYT07/b//nHX3vXC9345bgFYBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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