Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c7da144ee065e3b4c897e14fd679afce8ba416f4ac98b0505ccaee91b3e3b1d' 
  AND token = 'TXUHw2qGPALFdAjNMjie7EkVTilwvdib9RNNXAbxEhQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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