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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67d941584522bf56c65b13fc2809af26351c345a3401c6a5cf27d7878ce3847c' 
  AND token = 'QXIOu4Du873blqkVm35hNSziu/OZknkGZoy5HZjPMJk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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