Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8fff464cf75dc25bc7dc2c17b81486006d1e952fddd29ae8ec0c19afd93bb5d' 
  AND token = 'QipRBwWXiIbTPIsE257NORt9Eu2COkpu4jbxhvDW3LM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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