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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e1df98b6fd73f796c95d44b037c25fba6d22d6e2886ca15ae7272a80fc4634a' 
  AND token = 'alO590h+D8wj6amEIp3WrIOAaV2NBkvYyEaH7PYKdLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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