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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92a34f98d34f1c9c49e04d2af0bf7c4baf9c3f671b98823e2f1436ac4e1ce4a7' 
  AND token = 'yVj47Qmnm8oiYlU3Tm18EMeh9EfuXa2VcrMmBW0QYLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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