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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '901d3d3cb63b9e16ca123b475ea2e6223f3d718455a0d5345ae3a6087bfbb0f3' 
  AND token = 'UJ4PjwRzCE02AupS5IP2J2wC4aa/f1pchC8RxSS7OkM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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