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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d2bf8bfd6e91d0c1c516d32e1d96a861a12a0ac531a24b1d2594857740cadd6' 
  AND token = 'UwXlT6ukGBtqZMKXwJpTeokJkLfsIsIGf7wUttFymMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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