Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd87cdf0473e376e17deb0897f781f3c95a4a8ec70a660ee0fa4c04829dd3a0a8' 
  AND token = '9SoR8YhxCCZRYHXBZkbZR1/WZksVQv7xQVFfdfq19TM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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