Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'b7ee2055538911cb9616f15bdb6092a62e7539afb3e9c8e19f62e34b3a13da48' 
  AND token = '1VQqElVfBQQE3Q66ZkIHPzQhTPW21Zl637/nZga9YVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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