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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb7e93856e2012ae455fcfcd6fd66a672ccbdd72af7ed591d92ce461f6bc44dc' 
  AND token = 'DAc8iRsdmOeZr8pjNU9nOpq1ekasKn9SOKSexaX39Ys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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