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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bda192b910e7899f9b67f2357cefc22961374d965fa5ca8b8b7c749cab159236' 
  AND token = 'Ep45fzk3BjKGZXmT+m2H0z6Fcyylh4nPare5GaRhBUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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