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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95b710d3dd04cc69cc65a89cc6dac2e282a77d57ed896dd637eda289db8f6bcd' 
  AND token = 'iZF9Jueieg4XqFwtPnceZa8Gr/cTMME/0nIZLoX5Ino=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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