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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab265659856851e75e62d85687ce16cb45d9c9856aefe1eb86e4084c40bf2413' 
  AND token = 'N9Wm+nW8sQChqDROcKtsO+c0ntYdBb+TcLLsFicp/Xk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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