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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a4cba6795729c2625c266aee816129fe7b03b166e378ea6ba7981af1e2b8c87' 
  AND token = 'fWNU6V0w2HNoGWeLBzBdZ90/wJ0YtBi/2Vi2gsRBdMw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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