Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c52499714e621f045c69310ca3d986788e6f1bc2c90147bf99d9c24cb7a973d8' 
  AND token = 'wunPL+fR2F6jXeJLKHij1r9ptPYJs7LpJ61JcBYyeFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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