Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e02683063f0c6af454b2e360406f2eb4135a8d536f4af2cd63c5216a79430f05' 
  AND token = '6HrAvGO8Ggmv5s/VRx2YyEh8irJxUkp18CC299bwU8Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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