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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1585c119a87e76cba8da347a14f8d3573ce28470ddf113b3c8bde9023ad8facd' 
  AND token = 'zCM/FrOxD9//rfZMGDNSotXhbPdTKX2wZ2rpnwPee78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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