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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7319b35a21e6eef6059c5a5382061bf9ac94e676c966852f5cbe17f5fbe75697' 
  AND token = 'y2sFj5W9JgCeSJiyj4L0lN+ejIFco55pdXxVYhRDTjg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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