Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60f6b1b909416baf6f906c6419c8c8581fde2a9a6ad995a124ce6ce14ead2741' 
  AND token = '7FepKH56j/zHowD1bAvmNSMLPYdR75GsjavPqBUKUPk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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