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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e650126d581457275cb455f4ab6707ac6ac177553ef8d02b00a5120426c173c4' 
  AND token = 'otr4v6LZ45sURO3o9cUMniZqdDNgF+GAkAxP2jCsZ/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00066

JSON explain

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