Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2209285e19cde2295d849c0e8a38d7dec9f6ee19956683cd15230df4050c7b54' 
  AND token = '8efZRRecnCBvizKYBp3ueYZS7u9UqSWkNdm6ungS4PA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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