SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'aa6746bdb5b4fd00e673abcd68cf150f121e06c07c7e131e9728a3cd1695ee99' 
  AND token = '9vIKhGLjKT9U3JaZ02BVJRQqO8E89ptx/IpbqfUqeJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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