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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'fe46e45abf21db64602d066d2bc591740ef119c10c6b5db346e34ed56ee45244' 
  AND token = 'AbfH+MwrH4JodyiMVloxmvr4URWqJ35OK4DSiVVZWYw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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