Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fe3d0e8bc5bb13e06f6a09a7d89db9640821ad9994c56e6415ba87e09358723' 
  AND token = 'S60IkU4sixlsxde/AB44EGZ10EKi1jAmkYMs4T3/jXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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