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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72e8f5128ef1cdce62b1384d217935ee47eacfdc54fa113a9465030fc5d28537' 
  AND token = 'rijp1+vIP/3TUYIZw1O1lSoN8y1+7n5XgFfjWjNi62Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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