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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ff65a7dec4259313554ed8a02dca76c75e34c5874e0e91e8fd135ce6a25f60f' 
  AND token = 'fl7hafltc4ujX+d+I6HF2EUjJqkNWp19mUaBAmsBGo4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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