Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b2384284362aa07a261696d52a4003af5101a67fb85c5e846da8cb0e9a4041fd' 
  AND token = 'RZvM8ABOkqcU5+W9iNcmxii3RO3m5+kX3JW2tK9M3no=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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