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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97067ecc5e412a8c882eae0e4a7b3fde903d757c13063c66cdd2c1410aeedc34' 
  AND token = 'nI6RHxETdxHeqwm27Va/xts5soHeu7a0PrbdZBHyVLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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